The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2016
Filed:
Apr. 23, 2013
Johnson Electric S.a., Murten, CH;
Miha Furlan, Bern, CH;
Yvan Bourqui, Corminboeuf, CH;
JOHNSON ELECTRIC S.A., Murten, CH;
Abstract
A stepper motor has a rotor having a permanent magnet, a stator housing and a plurality of stator coil assemblies disposed within the stator housing. Each coil assembly has a bobbin, a coil wound about the bobbin, and two pole plates having pole fingers extending axially inside of the bobbin. The bobbin is disposed between the two pole plates and defines a space accommodating the rotor. A number of magnetic detent plates are disposed about the permanent magnet rotor. Each magnetic detent plate has a central opening accommodating the rotor and a plurality of projections extending inwardly, spaced about the central opening. The projections interact with the magnetic field of the rotor magnet.